Andrew Mitchell could have been a victim of a 'gigantic conspiracy' - video

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Britain's most senior civil servant says former Tory chief whip Andrew Mitchell could have been a victim of a 'gigantic conspiracy' involving members of the diplomatic protection group that polices Downing Street. Heywood appeared before MPs on the Commons public administration committee to give his assessment of Mitchell's confrontation with armed officers in Downing Street last September

Andrew Sparrow's rolling coverage of the day's political developments as they happen, including Nick Clegg being grilled by listeners on LBC and Sir Jeremy Heywood, the cabinet secretary, giving evidence to MPs about 'plebgate'